ArticleMagnetic resonance in medicine2021
FMRI based on transition-band balanced SSFP in comparison with EPI on a high-performance 0.55 T scanner.
Article in Magnetic resonance in medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Acceleration of slice encoding for metal artifact correction at 0.55 T using hexagonal sampling.Magnetic resonance in medicine · 2026Article
- Cartesian MaxGIRF: Model-based EPI reconstruction incorporating gradient nonlinearity and concomitant field effects.Magnetic resonance in medicine · 2026Article
- Free-breathing 3D pulmonary ventilation mapping at 0.55 T using stack-of-spiral out-in bSSFP.Magnetic resonance in medicine · 2026Article
- Assessment of the Diagnostic Efficacy of Low-Field Magnetic Resonance Imaging: A Systematic Review.Diagnostics (Basel, Switzerland) · 2024Review
- Optimization of Gradient-Echo Echo-Planar Imaging for TSensors (Basel, Switzerland) · 2023Article
- Cerebrovascular activity is a major factor in the cerebrospinal fluid flow dynamics.NeuroImage · 2022Article
- MaxGIRF: Image reconstruction incorporating concomitant field and gradient impulse response function effects.Magnetic resonance in medicine · 2022Article
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Authors and funding
5 authors.
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Abstract
purposeLow-field (<1 tesla) MRI scanners allow more widespread diagnostic use for a range of cardiac, musculoskeletal, and neurological applications. However, the feasibility of performing robust fMRI at low field has yet to be fully demonstrated. To address this gap, we investigated task-based fMRI using a highly sensitive transition-band balanced steady-state free precession approach and standard EPI on a 0.55 tesla scanner equipped with modern high-performance gradient coils and a receive array.
methodsTR and flip-angle of transition-band steady-state free precession were optimized for 0.55 tesla by simulations. Static shimming was employed to compensate for concomitant field effects. Visual task-based fMRI data were acquired from 8 healthy volunteers. For comparison, standard EPI data were also acquired with TE =
resultsActivation was robustly detected using both methods in a 4-min scan time. Transition-band steady-state free precession was found to be sensitive to interference from subtle spatial and temporal (field drift, respiration) variations in the magnetic field, counteracting potential advantages of the reduced magnetic susceptibility effects compared to its utilization at high field. These adverse effects could be partially remedied with static shimming and postprocessing approaches. Standard EPI proved more robust against the sources of interference.
conclusionBOLD contrast is sufficiently large at 0.55 tesla for robust detection of brain activation and may be employed to broaden the spectrum of applications of low-field MRI. Standard EPI outperforms transition-band steady-state free precession in terms of signal stability.
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